Humans have an internal lunar clock—but light pollution is disrupting it

Most animals, including humans, carry an internal lunar clock, tuned to the 29.5-day rhythm of the moon. It guides sleep, reproduction and migration of many species. But in the age of artificial light, that ancient signal is fading—washed out by the glow of cities, screens and satellites.

This article was originally published on MedicalXpress.com

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